SX1441EVK Semtech, SX1441EVK Datasheet - Page 57

• Manufacturer Part Number: SX1441EVK
• Description: KIT DEV FOR SX1441
• Manufacturer: Semtech
• Series: EasyBlue™r
• Type: Bluetoothr

Specifications of SX1441EVK

• For Use With/related Products: SX1441
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Contents: -
• Other names: SX1441DVK; SX1441DVK

Personal Area Network
3.13.3 Overview
The Bluetooth sequencer implements the Bluetooth specific hardware and lower layers of the protocol stack. The
lower layers handle time-critical and hardware-dependant tasks that must not be disturbed by the application. As a
qualified dedicated ROM-based coprocessor, the Bluetooth sequencer isolates the lower layers from the
application. As a consequence, debug and qualification time is dramatically decreased.
The Host Controller Interface (HCI) has been specified into the Bluetooth protocol as a standardized interface
between the lower and the upper layers. The upper layers are pieces of software implemented on the host
processor and communicating with the Bluetooth sequencer though the HCI. The HCI commands are carried by an
internal UART link between the host processor and the Bluetooth sequencer.
All Bluetooth specific commands are usually embedded into abstraction layers by the upper layers of the Bluetooth
stack, so that the programmer only deals with common services (e.g. serial port emulation, etc …). Full Bluetooth
stacks from various vendors have been successfully ported to the SX1441.
© Semtech 2006
Pos
1
0
Pos
7-6
5
4
3
2
1
0
RegBtmCtrl1
Reserved
BtmSync
RegBtmCtrl1
-
BtmWakeUp
BtmSleepRst
BtmClkStat
BtmSleepStat
BtmBusy
BtmOscEn
r/w
rw
R
r/w
r
rw
rw
r
r
r
r
Table 96 – RegBtmCtrl2 register
Table 95 – RegBtmCtrl1 register
Reset
0
0
Reset
00
0
0
1
0
0
1
57
Function
unused
BT Sequencer is locked on slot timing when set.
Function
unused
1 = Request BT Sequencer to resume from deep sleep
state
0 = default value
1 = Request BT Sequencer to resume from HALT state
0 = Enable Bluetooth Sequencer (see also bit 4)
1 = Internal
CLK_IN
0 = Internal BT sequencer clock is internally generated
1 = BT Sequencer in HALT mode
0 = BT Sequencer is active.
BT radio transmitter or receiver is active when set.
1 = BT Sequencer oscillator is active
0 = BT Sequencer oscillator is shut down.
BT sequencer clock is derived from
SX1441 – Bluetooth® 1.2 SoC
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Data Sheet